Two-time American champion John Isner has confirmed today he will be attending the ASB Classic in Auckland next January.

The US men's number one tennis player continues to show, particularly on the hard courts, he's one of the game's toughest opponents.

Isner, 32, captured two ATP Tour titles (Newport and Atlanta) in 2017 and made semi-final appearances at the Rome and Cincinnati Masters level events.

However, it is fond memories of Auckland that ensures there is no question where his preparations for the Australian Open will commence.

"Auckland will always hold a special place in my heart, it's where I won my first ATP title. I love Auckland, I've always played well there and I can't wait to get back there in 2018," said Isner.

Auckland has certainly been a happy hunting ground for Isner winning two titles (2010 and 2014) and making at least the quarter finals in all three of his other appearances at the ASB Classic.

"He obviously loves playing here and we are pretty happy about that. He is an entertaining guy with massive weapons," said ASB Classic tournament director Karl Budge.

"When that serve fires up it is pretty impressive. We might throw down a challenge to see if he can crack 240kp/h this year. He has done it abroad before so maybe we can rally him up for one of his best here."